Method of forming a groove
a groove and groove technology, applied in the direction of manufacturing tools, electric/magnetic/electromagnetic heating, pedestrian/occupant safety arrangements, etc., can solve the problems of uneven temperature at the blade edge, difficult to form a groove having a uniform depth and width in the inner surface of the instrument panel, and achieve uniform and accurate width and depth.
Inactive Publication Date: 2009-02-26
TOYOTA BOSHOKU KK
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Benefits of technology
[0015]Also in accordance with the first aspect of the present invention, only a blade edge can be heated by the use of the induction-heating device. Therefore, the blade edge can be heated and cooled within a short time period. The groove having the uniform and accurate width and depth thus can be formed in the inner surface of the member for covering the airbag.
Problems solved by technology
Therefore, heat conduction to the blade edge is not uniform, which causes unevenness in temperature at the blade edge.
This results in a problem that it is difficult to form the groove having a uniform depth and width in the inner surface of the instrument panel.
Also with the known method of forming the groove, when the blade edge is heated, the blade edge is difficult to be cooled.
This results in the problem that it is difficult to form the groove having the uniform depth and width in the inner surface of the instrument panel.
This causes a problem that the groove formed in the inner surface of the instrument panel can be seen through the outer surface of the instrument panel.
That is, there is the problem that the groove formed in the inner surface of the instrument panel is unexpectedly visible from the outer surface side.
Method used
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[0033]An embodiment in accordance with the present invention will be now described with reference to drawings.
[0034]FIG. 1 is a perspective view of an instrument panel 10. FIG. 2 is a sectional view of the instrument panel shown in FIG. 1 taken substantially along line A-A.
[0035]As shown in FIGS. 1 and 2, the instrument panel 10 that is a kind of vehicle interior materials includes a skin 12, a cushion 14, and a base 16. The skin 12, the cushion 14, and the base 16 are laminated in that order from an outer surface side to an inner surface side. Note that the skin 12 corresponds to “a member for covering an airbag” of the present invention.
[0036]The skin 12 may be made of, for example, genuine leather, synthetic leather, thermoplastic polyolefin resin (TPO resin), flexible polyvinyl chloride resin (PVC resin), thermoplastic polyurethane resin (TPU resin), or the like.
[0037]The cushion 14 may be made of, for example, resin foam such as polyurethane foam, polyolefin foam.
[0038]The base...
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Abstract
The present method of forming a groove in an inner surface of a member for covering an airbag includes the steps of heating a blade by use of an induction-heating device and pushing the blade against the inner surface of the member. The induction-heating device is preferably a coil for induction heating. In addition, the present method of forming the groove preferably includes the steps of placing the member on a work bench having the coil, supplying alternating current to the coil, bringing the blade close to the coil, pushing the blade against the inner surface of the member, stopping current supply to the coil, and pulling the blade away from the inner surface of the member.
Description
CROSS REFERENCE TO RELATED APPLICATION[0001]This application claims priority from Japanese Patent Application No. 2007-217423 filed Aug. 23, 2007. The entire content of this priority application is incorporated herein by reference.TECHNICAL FIELD[0002]The present invention relates to a method of forming a groove in an inner surface of a member for covering an airbag.BACKGROUND OF THE INVENTION[0003]A known airbag device includes an airbag and an airbag case that accommodates the airbag therein. The airbag device is mounted in the front passenger seat side of a vehicle in some cases. In these cases, the airbag device is mounted behind an instrument panel.[0004]The instrument panel is provided with an opening for allowing the airbag to inflate therethrough into the vehicle interior. The opening is, in normal conditions, covered with an airbag lid. In a crash of the vehicle, the airbag inflates, pushes the airbag lid from behind, and thereby opens the opening.[0005]The airbag device ha...
Claims
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IPC IPC(8): B26D3/06H05B6/10H05B6/36B60R21/20B60K37/00B60R21/205B60R21/2165
CPCB29C59/007B29L2031/3008B29C2035/0811Y10T83/0304
Inventor TADA, MASAOISHIHARA, YUKIO
Owner TOYOTA BOSHOKU KK